Ulmus × Triumph™
Native to (or naturalized in) Oregon:
- Broadleaf deciduous tree, grows rapidly when young, matures at about 50-60 ft (15-18 m) tall and 40-50 ft wide (12-15 m), oval to vase habit, branches arch somewhat as the tree matures. Leaves alternate, simple, about 10 cm long and 5 cm wide, margin doubly serrate, upper surface rough, glossy dark green, changing to yellow in fall.
- Sun to part shade. Reportedly resistant to Dutch elm disease and elm yellows; good resistance to elm leaf beetle.
- Hardy to USDA Zone 4 Triumph™ (cultivar name ‘Morton Glossy’, initially named 'Charisma' until it was realized in 1995 the name was already in use) resulted from a controlled cross conducted by Dr. George Ware at The Morton Arboretum between Vanguard™ Elm (Ulmus pumila x Ulmus japonica) and Accolade® Elm (Ulmus japonica x Ulmus wilsoniana). In the Flora of China, Ulmus japonica is now classified as Ulmus davidiana var. japonica and Ulmus wilsoniana as Ulmus davidiana var. davidiana.